Vehicle action simulation method and vehicle action simulation system

A vehicle action simulation system comprising:

• a tire ground contact characteristic measuring portion;
• and
• a vehicle behavior simulator,
• the tire ground contact characteristic measuring portion includes:
• a rotatable rotary drum,
• a stress measurer that is embedded on the rotary drum and measures stress applied to a tire in contact with the rotary drum, and
• a processor that calculates tire ground contact characteristics on the basis of the stress measured by the stress measurer,
• the tire ground contact characteristic measuring portion changes an attitude of a tire and a rotational speed of a rotary drum to reproduce a transient change in a tire attitude that occurs during travel of the actual vehicle on the tire based on input information before a predicted behavior has been determined and based on the predicted behavior thereafter,
• the processor calculates the tire ground contact characteristics corresponding to a tire attitude at each point in time during a period where the transient change occurs,
• the vehicle behavior simulator predicts the behavior of the actual vehicle during travel based on vehicle characteristics that are predicted from the tire ground contact characteristics calculated by the processor of the tire ground contact characteristic measuring portion, and
• the prediction of the behavior of the actual vehicle during travel performed by the vehicle behavior simulator, the reproduction of the transient change performed by the tire ground contact characteristic measuring portion, the measurement of stress performed by the stress measurer, and the calculation of the tire ground contact characteristics performed by the processor are performed in parallel.